Joint sittings of the two Houses of Indian Parliament are held to

Under Article 108 of the Indian Constitution, a joint sitting of the two Houses is an extraordinary mechanism used to resolve a legislative deadlock [4]. Such a deadlock occurs if one House rejects a bill passed by the other, if the Houses finally disagree on amendments, or if more than six months elapse without the bill being passed [4]. This provision applies only to ordinary and financial bills; it is not applicable to Money Bills or Constitutional Amendment Bills [2]. Money Bills are the exclusive domain of the Lok Sabha, while Constitutional Amendment Bills must be passed by each House separately under Article 368 [2]. Furthermore, the President and Vice President are elected by an electoral college, not through a joint sitting of Parliament [5]. Therefore, the primary purpose of a joint sitting is to consider and pass a bill on which the two Houses disagree [3].

Sources

1. [3] Laxmikanth, M. Indian Polity. 7th ed., McGraw Hill. > Chapter 23: Parliament > JOINT SITTING OF TWO HOUSES > p. 249
2. [4] Indian Polity, M. Laxmikanth(7th ed.) > Chapter 23: Parliament > JOINT SITTING OF TWO HOUSES > p. 249
3. [1] Indian Polity, M. Laxmikanth(7th ed.) > Chapter 23: Parliament > JOINT SITTING OF TWO HOUSES > p. 250
4. [2] Laxmikanth, M. Indian Polity. 7th ed., McGraw Hill. > Chapter 23: Parliament > JOINT SITTING OF TWO HOUSES > p. 250
5. [5] https://www.mea.gov.in/Images/pdf1/Part5.pdf